Cable-clamp.



J. H. KLIEGL.

CABLE CLAMP.

APPLICATION FILED 111111.15, 1911.

1,04;1,300, Patented 0ct.15,1912.

$3 {Latte 1mm v j T was :1; or, .1: T.

r allwhom'itmoy cor-c q Be it known that I, Jo H N 'H: "Knmorl, acitizen of the United States,"residin' 'at;

New ork, 'in the county-ands'tateof ewj .5 York, have invented'certainnew and useful Improvements in Cable-Clamps, of whlch the following is afull, clear, and exact dea clamp for a plug in which, the insulation atthe ends of -the conductors-shall be efs fectively' protected, so as toprevent myel ing, undue wear, or other injury thereto.

Another object of myinvention is to providejan improved clamp sothat-thec0nnections of the conductors-and contactsshall berelievedsubstantially of all strain, such for example-as might-otherwise beexerted on such connections when the cables are- -grasped and pulled towithdraw the plug from the device into which it has been inserted orwhere, as in stage connectors, it is promiscuously thrown about in:setting up and handling. the scenery..

A still further object is to provide aclamp for a cable whereby allstrain upon the plug itself in clamping the cablethereinis avoid edwhich permits the use of plugs that are fragile in character andincapable of with standing any degree of strain; f

Another, and very important feature or object of my invention is toprovide a clamp for devices of this kind which will allow'the use ofcables of difierent sizes to be used in 5 the same plug, junction box,etc.

Other objects of my invention are to provide a clamp of'this characterwhich shall be simple and compact, and capable of being easily andquickly attached to the cables;

One embodiment of the present invention is disclosed in the structureillustrated in the accompanying drawings, i-nwhich like characters ofreferemc denote correspond-- ing parts in all the vic\,vs..ai-id inwhich- 'Figurc 1 is a side view of my improved device shown Inconnection with a plug embledl form. Fig. 1.

form of clamp. V I

Referring to the drawing detail '1 3 deg. ignates'; the body 3 of a plugin, connection with which, Iv have chosen jto represent my device, said.plug being made pf; theeusual .insulatingmaterial. The body 1: has ahead2 prefierably integral therewith and-{of the same material, ,the bodyand the head being substantially of rectangular .c'rosesection.

3 .largejenough to receive the v'endgotf the conduct9r ;-to whichthe'plug is-attached, in the present; instance a cable 4', containing twoconductors,;5.and 6. Theinsulation at the end of. the-cable is-inclosed, aswillmore Extending downwardly and laterally from the socket3.-jarepassages 7, 8 opening preferably at the shoulders 9 and 101atthe-base of'the topor-head portion The conductors 5 and 6 arereceivedby-these passages and .when. inserted through these passages theyareconnected to the; contacts '11 and 12 ,throngh'the. instrumentalityof the socketenough to permit the terminal members to be passedtherethrough from-the socket 3, so that-the terminal members maybeattached to their conductors first, and the latter-then inserted intothe plugs through said passages.

socket as well as the terminal members and contacts the upper portionof" the head is cut awayon both sides a sufiicientdepth" to expose thecable in the socket, the socket, as understood,- being large enough tore uscd'with the particular form of plug. By cutting away both sides ofthe top, as shown, there result-s ahead having two upwardi protrudingncmbersor projections 15 and 16. These protruding members are perforatedas shown atlfand 18 adapted to receive internally screw-threaded.-"extensions or members 19 and "-20 on clamp '21. I This In the'tppcrhead 2. is an aperture or socket For-"the purpose of binding the cablefirmly in the socket 3 'to"eliminate all strain upon the conductors '5and 6 below the ceive the maximum .size of the cable .to be 105 tilf'E 1away di h s fully appear. later, in the top 0f '-t-h plug andsqprotected from'raveling or other ined terminal members 13 and 14 asshown. Preferably the. passages are. niade' large clamp is provided-withsuitable clamping ribs 22 which bite into the cable whenthe clamping isbeing perfected; A corresponding c amp 23 is ocated on the opposite sideprovided with male members 24 and 25 adapted to engage the internalscrewthreads or membersl9 and' 20. It is obvious that the cable could beclampedwithout the use of the internally screw-threaded mem- 10 bers buttheir use-not only makes the clamp a more efiicient one theoreticallybut-also from a ractical and commercial point of view. y their use-itwill be notedthat whether a large or small cable be'used the malemembers 24 and 25 .never project beyond the clamping member21 and with'the same male members a larger cable j'can ,be clamped, the saidmembers then en ging with therthreads'of the extensions. 11 additibn tothe above advanta es it will be obt 4 served that-the extensionsacilitate the assembling of the clamping members 21 and 23.

The ribs 22 on the respective clamps may be of" any desiredsize or she.e. Toobtain the best results however the ength' of said ribs should beslightly less than the distance between the protruding'members 15 and 16so as to efiecti-vely clamp a small cable, for instance, a cable whosediameter is equal to or is less than the thickness of the protrudinmembers or projections 15 and 16. See *ig. 3 for this construction.

n will be observed from the foregoing that many advantages are obtainedby this invention which, so faras I am aware have never been touchedupon before. All clamps for a similar purpose which have been evolvedheretofore are incapable of clamping more than one size of cable. Withthis be clamped.

device,'in its referred form, three sizes can or instance cables whosesizes range from No. 6 to No. 14 can be clam e plug, it bein understoodas be ore stated, that the s et 3 is made for the maximum size of cableto beusedJIf a lar r number of cable is to be used, it will be own by311' electricians, that it is then necessarv to use a lar r plug, and, aconverao, i a smaller cab e is to be used than those above mentioned asmaller plug should also be used. However thedevice shownand describedis capable of clamping the smallest known cable .for then it is onlynecessary to so enlarge the ribs on the clam s that when the latter areassembled the istance between the respective ribs will be less than the.diar'neter of the cable. Again when it is desired to use a larger ca le(if the socket 3 will permit it). it will only be necessary to lengthenthe screws 24 and 25.

It will also be apparent from the foregoing that the cable canbe clampedas tight as desired between the clamping members 21 and 23 withoutputting any strain upon the avln'g open sides and protrudin insulatingmaterial. At'most there will be nothing more thana longitudinal pullupon the projections 15 and 16. For this reason a less tenaciousandaless expensive insulating substancc'nan be used without any dangerof s I littin or rupturing the same.

. The evice herein specifically described,

as before stated, is capable of being used in other relations'aud is notlimited in its field of usefulness to a switch plug. Moreover thespecific device herein described is merely the preferred embodiment ofmy invention,

and may be'embodied in various other spe-l cific forms without departurefrom its' proper scope as defined. in the following claims. f 4 I v InFig. 5 a slight modification of clamp 21 is shown. Sockets 26 (only oneshown) are provided therein for the purpose of re ceivin the rivetedheads 27 (onlv one shown so as to prevent the removal of parts andconsequent loss of the same.

What I'claim is:

1'. In a cable clam'p a member provided 1 with a"so'cket therein adaptedto receive a cable," means projecting outwardly therefrom, clampingfrnembers for the cable mounted on the opposite sides of the. projectingmeans and means on the clamp ng members cooperating withsaid'project-lng .members located between the clamps having perforationstherein, and means passing through said perforations and adapted to bindthe clampin members upon the cable.

4. In a cab e with a socket therein adapted to receive a cable, ed esprotruding outwardly from said socket, c amping members mounted on theopposite sides of the protruding edges, and means cooperating with saidedges for clamplilpg the cable.

clamp, a. member provided lates extending across t e open a cable clamp,in combination, a I

member provided with a socket therein adapted to receive a cable,protruding edges havmg perforationstherein, clamping members mounted onthe opposite sides of the protruding edges, and means onsaid clampmgmembers extending througilsaid pertorations for clamping said ca 6. In acable'clam'p, in combination, a

threaded extensions enterin member provided with a socket therein havingperforations therein, a ribbed clamping member mounted in one of theside openings and having internally screwthe perforations in theprojecting e ges, a ribbed clamping member mounted in the other sideopening, and having male members extending therethrough and engaging thescrewthreads of the extensions whereby the cableis clamped in thesocket.

7. In a cable clamp, in'combination, a member provided with a sockettherein adapted to receive a cable, said socket provided with open sidesand projecting edges having perforations therein, a ribbed clampingmember mounted in one of the side openings and having extensionsentering the perforations, perforations extending through saidextensions and the flange, a part of said perforation beingscrew-threaded and a part enlarged beyond the screw-threads, and

a ribbed clamping member mounted in the other side openmggwand havingscrewthreaded male members extending through the'same and engaging theserew-threads'of the secondmentioned perforations said male membershaving riveted heads thereon adapted to enter the enlarged part of thesaid second mentioned perforations.

In testimony whereof I aflix my signature in the presence of twosubscribing witnesses.

JOHN H. KLIEGL.-

Witnesses:

M. Lnwson DYER, W'M. BOHLEBER.

